Can't Pull the Trigger

Or press the button, or whatever. I've been tracking the market closely for a few days now, keeping the model updated etc. Last night in the US (US daytime) the market suddenly reversed in the afternoon and switched the model to short mode. But I still dont seem to be able to place a trade. I've been looking at the SPI futures market (Australian Share Price Index) this morning and have seen a couple set ups (really I should have been short from the open) and I can't make the decision to do that either. The upside is I'm at least not making bad trades against the model. Last night we met with one of my friends again (funny that both times we met so far it rained and those were the only serious showers since we've been here). He said: "You had better do something big soon". He was kidding, but maybe not really.